This lesson involves the Runners' applet from the NCTM website. The applet uses two runners, and allows for a variety of parameters. Changing the parameters on the applet helps students develop an und...More: lessons, discussions, ratings, reviews,...

This worksheet follows up on the classwork activity. Although the homework can be done without having access to the web, it is more beneficial for students to use the applet to check their answers.More: lessons, discussions, ratings, reviews,...

Depending on the student's approach to this problem, many types of math can be incorporated to solve this problem. The concept of ratio is used throughout, and students can solve the problem by experi...More: lessons, discussions, ratings, reviews,...

This problem allows students to investigate different data collection methods. Students realize that they get different data depending on whether they have a small sample size, but a large number of t...More: lessons, discussions, ratings, reviews,...

This problem allows students to investigate ratio and proportion, by discovering the exchange rate between different alien currencies (i.e. 7 circles have the same value as 3 triangles, etc.) By manip...More: lessons, discussions, ratings, reviews,...

Students answer the question: Is the ratio of our arm span to our height really equal to 1? If an emphasis is given to a/h = 1, this can be an engaging activity using variables. Use a spreadsheet to w...More: lessons, discussions, ratings, reviews,...

This is the student page that goes with the When Gas Was a Quarter! lesson plan. In this exercise, students explore the following questions: Why does everything cost so much more now, compared to when...More: lessons, discussions, ratings, reviews,...

Finding a rule for the number of hits is only the first step in exploring the Paper Pool game. Students can gain a deeper understanding of the patterns by considering graphical representations of the ...More: lessons, discussions, ratings, reviews,...

Students will continue their investigation of the Paper Pool game by exploring more tables and organizing the results. Using the data that they collect, they will attempt to find a relationship betwee...More: lessons, discussions, ratings, reviews,...

Question: Is the ratio of our arm span to our height really equal to 1? If an emphasis is given to a/h = 1, this can be an engaging activity using variables. Use a spreadsheet to work with the data.More: lessons, discussions, ratings, reviews,...

In this lesson, students continue their investigation by discovering a rule to predict the pocket in which the ball will land. As an extension, students can also consider the number of squares that a ...More: lessons, discussions, ratings, reviews,...

In the first four lessons of this unit, students investigated the Paper Pool game, collected data, identified patterns, and made predictions about the number of hits, the pocket in which the ball land...More: lessons, discussions, ratings, reviews,...

Why do things cost so much more now than they used to? Students will find out about inflation in the United States.
With this lesson, students will use the Consumer Price Index and explore inflation ...More: lessons, discussions, ratings, reviews,...

An activity designed to take advantage of the features of the TI-15 calculator. Using a toy lion and a lever, students will discover how much work is needed to raise the toy lion. They will use propor...More: lessons, discussions, ratings, reviews,...

The "All About Ratios" activities are designed to introduce ratios in a concept-building way. The activities can be done on computers with Internet access or be printed. The author suggests that pairs...More: lessons, discussions, ratings, reviews,...

Ameba is designed to help students gain a better understanding of ratios and proportions. Students are asked to eat a given amount of dots in reference to the total number of dots on the board. The to...More: lessons, discussions, ratings, reviews,...

The Personal Shopper game uses shopping and money-handling in order to reinforce the idea of proportional reasoning. The gameplay involves the player being given a certain amount of money, and a perc...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.